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nlscatalog.loc.gov screenshot

Report Summary

  • 50

    Performance

    Renders faster than
    68% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

nlscatalog.loc.gov

NLS Catalog

Page Load Speed

443 ms in total

First Response

50 ms

Resources Loaded

306 ms

Page Rendered

87 ms

nlscatalog.loc.gov screenshot

About Website

Visit nlscatalog.loc.gov now to see the best up-to-date NLS Catalog Loc content for United States and also check out these interesting facts you probably never knew about nlscatalog.loc.gov

Find material in NLSBPD's collections of books, magazines, talking books, music scores, music talking books, and maps. Search by keyword or browse for authors/narrators, names/titles, NLS subjects, NL...

Visit nlscatalog.loc.gov

Key Findings

We analyzed Nlscatalog.loc.gov page load time and found that the first response time was 50 ms and then it took 393 ms to load all DOM resources and completely render a web page. This is an excellent result, as only 5% of websites can load faster.

Performance Metrics

nlscatalog.loc.gov performance score

50

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.4 s

38/100

10%

LCP (Largest Contentful Paint)

Value4.1 s

46/100

25%

SI (Speed Index)

Value3.4 s

90/100

10%

TBT (Total Blocking Time)

Value1,660 ms

11/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value5.4 s

72/100

10%

Network Requests Diagram

nlscatalog.loc.gov

50 ms

nls.css

73 ms

voyagerhelp.css

54 ms

s_code.js

21 ms

transparent.gif

17 ms

Our browser made a total of 7 requests to load all elements on the main page. We found that 14% of them (1 request) were addressed to the original Nlscatalog.loc.gov, 57% (4 requests) were made to Loc.gov and 14% (1 request) were made to Cdn.loc.gov. The less responsive or slowest element that took the longest time to load (73 ms) relates to the external source Loc.gov.

Page Optimization Overview & Recommendations

Page size can be reduced by 22.4 kB (58%)

Content Size

38.7 kB

After Optimization

16.3 kB

  • HTML
  • JavaScript

In fact, the total size of Nlscatalog.loc.gov main page is 38.7 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. Only 5% of websites need less resources to load. Javascripts take 34.4 kB which makes up the majority of the site volume.

HTML Optimization

-65%

Potential reduce by 2.8 kB

  • Original 4.3 kB
  • After minification 4.1 kB
  • After compression 1.5 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 2.8 kB or 65% of the original size.

JavaScript Optimization

-57%

Potential reduce by 19.6 kB

  • Original 34.4 kB
  • After minification 30.5 kB
  • After compression 14.8 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 19.6 kB or 57% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

6

After Optimization

6

  • Images
  • JavaScript
  • CSS

The browser has sent 6 CSS, Javascripts, AJAX and image requests in order to completely render the main page of NLS Catalog Loc. According to our analytics all requests are already optimized.

Network Requests Diagram

nlscatalog.loc.gov

nlscatalog.loc.gov

50 ms

nls.css

nls.css

73 ms

voyagerhelp.css

voyagerhelp.css

54 ms

s_code.js

s_code.js

21 ms

transparent.gif

transparent.gif

17 ms

990033_mahogany_pixel.gif

990033_mahogany_pixel.gif

17 ms

s59875359039288

s59875359039288

40 ms

Accessibility Review

nlscatalog.loc.gov accessibility score

100

Accessibility Issues

Best Practices

nlscatalog.loc.gov best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

SEO Factors

nlscatalog.loc.gov SEO score

69

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Page is blocked from indexing

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Nlscatalog.loc.gov can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Nlscatalog.loc.gov main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

nlscatalog.loc.gov

Open Graph description is not detected on the main page of NLS Catalog Loc. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: